Предмет: Математика, автор: Vaila2003

Решить уравнение
1,3-3,6(х-3)=5(8-0,4х)

Vaila2003: 3,2х?

Ответы

Автор ответа: Teodor97

17

1,3-3,6(х-3)=5(8-0,4х)
1,3-3,6х+10,8=40-3,2х
-3,6х+3,2х=40-10,8-1,3
-0,4х=27,9
х=-69,75

Vaila2003: Откуда взялось 3,2х? 5*0,4=2

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Русский язык, автор: sabinameldebekova

Синквейн к слову дело

1 год назад

Предмет: Русский язык, автор: Урок541

написать слова по схемам приставка корень суффикс окончание, приставка корень суффикс, корень окончание

1 год назад

Предмет: Английский язык, автор: FDimonF

Раскройте скобки и выберите правильный вариант.

1. It often (rain) in this part of the world.

a) is often raining b) often rains

2. Take your umbrella. It (rain) cats and dogs.

a) rains b) is raining

3. Granny is in the kitchen. She (make) a plum-cake.

a) is making b) makes

4. My wife often (make) plum-cakes.

a) is often making b) often makes

5. Can you phone a bit later, please? Jane (have a bath).

a) is having a bath b) has a bath

6. Run downstairs. Your sister (wait) for you.

a) is waiting b) waits

7. I don’t know Spanish, but I (learn) it now.

a) am learning b) learn

8. John (still/work) in the garden.

a) is still working b) still works

9. Dad usually (work) on Saturdays.

a) is usually working b) usually works

10. Usually I (have coffee) in the morning, but now I (drink) tea.

a) am having coffee/drink b) have coffee/am drinking

11. We sometimes (go) to the cinema.

a) are sometimes going b) sometimes go

12. What she (do)? – She is a secretary at our college.

a) is she doing b) does she do

13. Why you (sit) at my desk? Could you take your place, please?

a) Why you are sitting? b) Why are you sitting?

14. We’ve got tickets, and tomorrow evening we (go) to the cinema.

a) go b) are going

15. … you (do) anything tomorrow afternoon? – I (play) tennis with my friend.

a) Are you doing/am playing b) Do you do/play

1 год назад

Предмет: Математика, автор: vcoevoeve

как сделать? пожалуйста

7 лет назад

Предмет: Математика, автор: vcoevoeve

помогите пожалуйста

7 лет назад